1) Which of the following formulae is used to calculate tangential stress, when a member is subjected to stress in mutually perpendicular axis and accompanied by a shear stress?
a. [(σ x – σ y)/2 ]sin θ – τ cos 2θ
b. [(σ x – σ y)/2 ]– τ cos 2θ
c. [(σ x – σ y)/2 ]sin θ – τ 2 cos θ
d. None of the above
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Answer
Explanation
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ANSWER: [(σx – σy)/2 ]sin θ – τ cos 2θ
Explanation:
No explanation is available for this question!
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2) When a component is subjected to axial stress the normal stress σn is maximum, if cos θ is _______ . (σn=σxCos2θ)
1. maximum
2. minimum
3. always one
4. always zero
a. 1 and 4
b. 1 and 3
c. 2 and 3
d. 2 and 4
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Answer
Explanation
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ANSWER: 1 and 3
Explanation:
No explanation is available for this question!
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3) The angle between normal stress and tangential stress is known as angle of ______
a. declination
b. orientation
c. obliquity
d. rotation
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Answer
Explanation
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ANSWER: obliquity
Explanation:
No explanation is available for this question!
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4) Principal stress is the magnitude of ________ stress acting on the principal plane.
a. Normal stress
b. Shear stress
c. Both a. and b.
d. None of the above
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Answer
Explanation
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ANSWER: Normal stress
Explanation:
No explanation is available for this question!
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5) Which of the following stresses can be determined using Mohr's circle method?
a. Torsional stress
b. Bending stress
c. Principal stress
d. All of the above
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Answer
Explanation
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ANSWER: Principal stress
Explanation:
No explanation is available for this question!
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6) The graphical method of Mohr's circle represents shear stress (τ) on ______
a. X-axis
b. Y-axis
c. Z-axis
d. None of the above
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Answer
Explanation
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ANSWER: Y-axis
Explanation:
No explanation is available for this question!
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7) In Mohr's circle method, compressive direct stress is represented on ____
a. positive x-axis
b. positive y-axis
c. negative x-axis
d. negative y-axis
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Answer
Explanation
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ANSWER: negative x-axis
Explanation:
No explanation is available for this question!
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8) What is the value of shear stress acting on a plane of circular bar which is subjected to axial tensile load of 100 kN? (Diameter of bar = 40 mm , θ = 42.3o)
a. 58.73 Mpa
b. 40.23 Mpa
c. 39.60 Mpa
d. Insufficient data
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Answer
Explanation
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ANSWER: 39.60 Mpa
Explanation:
No explanation is available for this question!
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9) The maximum tangential stress σt = (σx sin 2θ)/2 is maximum if, θ is equal to ________
a. 45 o
b. 90 o
c. 270 o
d. all of the above
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Answer
Explanation
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ANSWER: 45o
Explanation:
No explanation is available for this question!
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10) Minor principal stress has minimum ________
a. value of shear stress acting on the plane
b. intensity of direct stress
c. both a. and b.
d. none of the above
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Answer
Explanation
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ANSWER: intensity of direct stress
Explanation:
No explanation is available for this question!
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